Karaev, M.T.Mustafayev, H.S.2025-05-102025-05-1020030035-759610.1216/rmjm/11810699352-s2.0-1642403902https://doi.org/10.1216/rmjm/1181069935https://hdl.handle.net/20.500.14720/6384Deddens algebras and Shulman subspaces are introduced and their properties are studied. The descriptions of Deddens algebras associated with nilpotent and idempotent elements are given. © 2003 Rocky Mountain Mathematics Consortium.eninfo:eu-repo/semantics/openAccessArticle333Q3Q3915926